Automatic elevator-stop.



J. D. KOUYMAN AUTOMATIC ELEVATOR STOP.

APPucATmN msn APR. 22.1913.

Snom/Liao@ meme@ Apr. zo, 1915.

Q l" l .i Kill ymuoia JOHN JD.` KOOYMN, OF SALT LAKE CITY, UTAH.

AUTOMATIC ELEVATOit-STOP.

inseam.

TocaZZ whom tft may concern.' c

Be it known that l, JOHN D. KooYMAN, subject of the Queen of the Netherlands, residing at Salt Lake City, in the county of Salt Lake and State of Utah, have Y1nvented certain new and useful Improvements in Automatic Elevator-Stops, of which the following is a specification.

My invention relates to new` and usefull improvements in safety devices for elevators and the object of my inventionis to provide atrip mechanism which will automatically cut 0E the power and therefore stop an ascending elevator if any object carried by the elevator. car should project therefrom in such a manner as to strike beneath the floor which the car is approaching.

lt often happens that elevators, and particularly freight elevators, operating in an open well, are so carelessly loaded that a packing box or other `object carried by the elevator projects a sutlicientdistanee beyond the elevator to strike, beneath the floor of an upper story, during the upward movement of the car thereby blocking further movement .of the car. Under the present circumstances, if suchan occurrence takes place, the result is a burning out of the fuse through which the motive current passes or a breaking of the elevator cable or other injury to the lifting mechanism of the ele vator. f

The object of my invention is to provide an automatic trip for attachment to elevator wells which will overcome this difficulty.r

A further object of my invention is to provide a trip in the elevator well at each floor and so arranged that all of the trips are operatively connected to the power controlling cable of the elevator. And a still further object of my invention is to construct the trips in the form of an apron or shield so that when the Hoor of the elevator has passed above the lower portion of the tri it will absolutely be impossible for any ob]ect to later movey outwardly'between the trip and floor to obstruct the'passage of the elevator;

With these and other objects in view, my invention will be more fully described, illus- `trated in the accompanying'drawing, and

then specifically pointed out in the claim which is attached to and forms a part of this application.

1n the drawing: Figure 1 is a fragmentary sectional View showing a conventional Specification of Letters Patent.

form of elevator well and car in elevation; Fig. 2 is a sectional view on the line 2-2 of Fig. 1. y

Corresponding and like parts are referred to in the following description and indicated in alll the views of the drawing by the same reference characters.

In order to insure a clear and complete understanding of my safety applianceflf this mechanism being in turn actuated andv controlled by the power controlling cable 16 which forms an endless belt aboutv a pulley 17 carried by the control mechanism and a pulley 18 mounted at the bottom of thewell, one side of this cable belt passing through the car and being adapted to "be pulled up or down to operate the control mechanism and so cause the elevator to move. usual manner, 'that is if pulled upwardly the cable will actuate the control mechanism to stop the movement of the elevator. lt

`will therefore be apparent that if'trip devices are positioned at each floor of the elevator well and operatively connected to this cable in such a manner that when engaged rammen npr. ao, isis.-

Appcation leii April 22, 1918. Serial No. 762,901. I Y

This control cable operates'in the and moved they will pull upwardly on the cable the protection desired will be aoreled.'l

The elevator well illustrated is of the usual each floor one at the front and one atthe.

back. Each of these trips includes levers 419 1" pivoted intermediate their length upon'- downwardly depending brackets 20 carried by the floor adjacent the sides of thelwell, the

outer ends of these levers being connected byv a rod 21. -A plate of sheet metal 22 has its lower edge curled about the rod 21 and riveted to securethe plate to the rod and the body portion of this plate extends upwardly and outwardly to rest against the edge of thefloor front bf the -well, as

' Stop arms 23 carried by the Hoor or any suitable portion ofthewell extend in the path of the inner ends of the levers to limit their movement and hbld the levers in such' a manner that the lower edge or rod inclosing portionfof-fthel-trip vshield or apron eX- Vtends a considerable distancebelow the floor and just clear of the path of the elevator which passes between the, levers and between lthe tripshields or aprons.

A cable 24 is secured by one end. to the nerend ofone of the levers ofthe lowermost @trip deviceat thefrontl of the elevator and s through the corresponding levers of all trip devices at the various iioors atthe front of the velevator gandby `its upper end to the inf n er arm vcfa leverL25 which is pivoted inter- 4- mediate i,ts' length upon .a bracket 26. In l I 20v like manne-r aV cable 27 connects thefree ends of corresponding levers of the trip devices at the rearI of the elevator lwith one l s arm of a bell; crank lever 28 alsocarried by a 15 passes.` Apair of adjustable stops 33 are secured uponthe inner section of the control cablesucha position lthat when the trips are in operative position and the free ends of the levers 25 andBl inclineddownwardly-as shown in Fig. 2, these stops-will rest upon vthe eyes of the adjacent levers. Under these conditionsit will be apparent that any upwardswingingofthe outer end of any one of the tripswill act either through the cable 24 and lever 25 or through the cable 27 and levers 28 and 3l upon the control cable 16 to pull the ,same upwardlyl and shut ofi' the `power from the raising mechanism of the elevator. The weight of the shield plates or aprons of? thetrips is sufficient to holdthe tripsin activefposition while the levers 25 and 2 8 may be-normally heldin position by helical springs 34: and 35,respectively, or

countelwglted for thesame purpose as preferredf The operation of my safety appliance will be readily understood from the foregoing description when taken kin connectionwith the' drawing, it being clear that any object carried by the car and extending beyond the edge of the same at the front or rear will engage against the lower ortion of the trip to swing the same upward y and act through the trip cable to operate the control cable and shut off the power. The4 shields or aprons 22 may be omitted if preferred without affecting the operativeness of the appliance, but these shields, if employed, will absolutely prevent accident which might otherwise happen through the outward movement of some object in the car during ascent of the car and after it had passed a trip and before it had reached the adjacent floor. 'lf the shields are employed, it will be apparent that no such outward movement of the object would be possible as it would strike against the inner face of the shieldv or apron and be held in place.

It will of course be understood that I do not wish in any way to limit myself to the specific details of construction illustrated in the drawing and described in the vabove specification or to the application of the safety appliance to the particular type of elevator therein shown and described, as various minor changes, within the scope of the appended claim, may be made at any, time, without in the slightest degree departing from the spirit of my invention.

The stops 33 are preferably spaced apart so that either lever 25 or 31 may be swung to stop the car without aifectingthepthcr and consequently without having to 'raise the trips at the opposite side of the well.

Having thus described the invention, what is claimed as new is: A

The combination with -an elevator well and a cage mounted fortravel therein and a power controlling cable, of tripping means arranged below each iioorof the well, levers having coperative engagement with the power controlling cable at spacedpoints, the tripping means at each iloor of the well being arranged at the opposite-sides of the opening in the ioor, and `cnmjection' between eachof the tripping means and one of the levers for actuating the leverwhen the respective means is tripped.

In testimony whereof I 'fixmy signature in presence oftwo witnesses,

JOHN D. KOOYMAN. 'L [n s] Witnesses:` j

LEAH NEIVH'AS. Urro Ulrnns.

Copies of thispatent may be obtained for ave cents each, by addressing the Commissioner of Patents,

washington, D. cfr, M 

